BIRDS OF NORTH AND MIDDLE AMERICA. 679 
cc, A white pectoral spot; rectrices purplish black, their shafts rufous beneath,® 
the lateral ones less than 40 mm. (Bolivia.) 
Popelairia letitiz, adult male (extralimital).® 
aa. Tail slightly forked or double rounded, the lateral rectrices not attenuated; head 
and anterior under parts partly white. (Adult females.) 
b. Thighs not rufescent; throat and chest not uniform sooty black. 
ce. Thighs black......... Popelairia conversii equatorialis, ¢ adult female (p. 680). 
cc. Thighs white.............- Popelairia langsdorffi, adult female (extralimital). 
bb. Thighs rufescent; throat and chest uniform sooty blackish. 
Popelairia popelairii, adult female (extralimital). 
POPELAIRIA CONVERSI ZQUATORIALIS (Berlepsch and Taczanowski). 
SALVIN’S THORN-TAIL. 
Adult male-—Above deep metallic green (brightest on pileum), the 
lower rump and shorter upper tail-coverts usually dark coppery 
bronze or partly of this color; a narrow white band across upper 
rump; tail slightly glossy blue-black, the shafts of the rectrices white 
basally, passing into brownish gray terminally, pure white for entire 
length on under surface, the webs brownish gray immediately next 
to shaft; remiges and primary coverts dusky, very faintly glossed 
with purplish; chin, throat, and chest bright metallic grass green; 
rest of under parts duller metallic green, the center of breast with a 
patch of metallic bluish green or greenish blue, intermixed centrally 
with dark blue or bluish black; femoral tufts white; bill black; iris 
dark brown; feet dusky; length (skins), 93-110 (104); wing, 40-43 
Hist. Nat. Ois.-Mouch., iii, 1877, 238, pl. 94; Salvin, Cat. Birds Brit. Mus., xvi, 1891, 
429.— Mellisuga langsdor ffi Mulsant and Verreaux, Classif. Troch., 1866, 79.—Popelaria 
langsdorfi Ridgway, Proc. U. 8. Nat. Mus., iii, Oct. 27, 1880, 315 (Brazil; Pebas, 
e. Peru).—Plopelairea] langsdorfii Hartert, Das Tierreich, Troch., 1900, 223.— 
(?) Gouldia melanosternon Gould, Ann. and Mag. N. H., ser. 4, i, May, 1868, 323 (Napo, 
Pebas, and Ucayali, e. Peru; coll. J. Gould).—[ Trochilus] melanosternon Gray, Hand- 
list, i, 1869, 146, no. 1879. ; 
@ According to Elliot; but Salvin says they are white beneath. 
b Trochilus letiti# Bourcier and Mulsant, Ann. Sci. Phys. et Nat., etc., Lyon, iv, 
1852, 143 (Bolivia).—{Gouldia] laetitia Reichenbach, Aufz. der Colibr., 1854, 12.— 
Gouldia letitie Gould, Mon. Troch., iii, 1855, pl. 130; Introd. Troch., oct. ed., 1861, 
86; Elliot, Classif. and Synop. Troch., 1879, 189.—P[rymnacantha] laetitiae Cabanis and 
Heine, Mus. Hein., iii, 1860, 64, footnote.— Mellisuga letitia Mulsant and Verreaux, 
Classif. Troch., 1866, 79.—Prymnacantha letitie Salvin, Cat. Birds Brit. Mus., xvi, 
1891, 481.— Mythinia letitiz Mulsant and Verreaux, Hist. Nat. Ois.-Mouch., iii, 1877, 
245.—[ Mytinia] letitie Mulsant, Ann. Soc. Linn. Lyon, xxii, 1876, 224.—P[opelairea] 
letitiae Hartert, Das Tierreich, Troch., 1900, 224, 
cI have no females of P. c. conversit nor P. letitiz for comparison, 
